Head for bit-stocks.



No. 814,818. PATENTBD MAR. 6, 1906. W. A. PEGK. HEAD FOR BIT STOCKS.

LPZLIUATIOII' FILED FEB. 25. 1905 lzrzajou'ass H Z 34: SM y w UNITED STATES PATENT OFFICE,

WILLIAM ALLEN PEOK, OF JERSEY CITY, NEW JERSEY.

HEAD FOFI BIT-STOCKS.

Specification of Letters Patent.

Patented flarch e, 1906.

Application filed February 25,1905. Burial No. 247,877.

To 0% whom it may concern:

Be it known that I, WILLIAM ALLEN Pnon, a citizen of the United States of America residing at Jersey City, in the county of Hud- "son and State of New Jersey, have invented new and useful Im rovements in Heads for Bit-Stocks, of whic the following is a specification.

This invention relates to bit-braces or the like, and resides particularly in certain improvements in the construction of the knob or head whereb the latter ma take the thrust of the too Wlien in use an also in the construction of the center ip or handle located on the crank-arm,w ereby the latter is rotated.

The objects of the invention are, first, to provide a knob construction which may be rotatively secured on the end of the cra'nkarm in a strong and simple manner and which may bereadily removed therefrom and which permits an accurate and close adjustment o the parts Without binding, and, secondly, to provide a construction of a center grip or handle inwhich the friction is re duced to a great degree and whereby rovision is made against injury of the hen is b the splitting of the latter or which, if desired ernnts the ip or handle to be made in two on 'tudinall y-disposed arts. l a e invention is clear illustrated in th accompanying drawin s, 1n which Figure 1 is sectiona elevation of the improved knob construction, the end of the ago Fig. 5

crank-arm being shown in-ful] lines. Fig. 2 is a cross-section on line 2 2 of Fig. 1 Fig. 3

is a sectional elevation of the center ip or in lines.

handle, the crankam being Fig. 4 is a cross-section on line 4 4 of Fifi. 3.

is a similar view ,to Fig. 3 and i ustrates a slight modification in theconstruction shown in that figure and Fig. 6 is a cross section on-line 6 6 of 5.

Referring to the drawings, :1 indicates portions of .the crank-arm of ,a bit-brace on which. are fitted the knob and the center grip in their usual ositions, and the novel position of the knob willfirst be described.

'Thebody of the knob is indicated b b and preferably is mad e'of wood and is, 'ke all structures of this character substantially semispherical and is mounon a circular plate c having a long hub d, which fits rotatably the u per end of the crank-arm a, the lower and o the hub d bein supported on a shoulder a. The circularp ate 0 preferably has an upturned peripheral flange f to stiffen it and to-receive within its borders the lower portion of a head 1;, the latter bein secured to said late in the usual manner. entrally of the p ate, extending a short distance above it, is a hub g, which is screw-threaded ex teriorly to receive the nut h which is insorted centrally of the knob l), as shown in Fi I, and screwed down over this threaded hu g. The upper end of the nut h is sunk somewhat belowthe surface of the knob, and the plate 7' of larger diameter than the nut is placed .over the latter and is also let into the surface of the knob. The uplpler end of thenut is bored out and screw-t ceded to receive a screw 7c, the head'of which has a hearing in the plate 7', as shown in the drawings. Beyond the screw-threaded lower oortion of the not it the latter is counterbored to receive the upper extremity of the crank-arm a, and an annular groove is turned in the end of the latter to receive the two part washer m. (Shown in section a in Fig. 1 and in plan view in Fig. 2.) The plane of the groove which'receives this washer is so located 1' lative to the up or end of the hub g that the circular p ate 0 is in position on the end'of the crank-arm and the washer min its place in said groove the plate c will be secured rotatably on the end of'said arm, and when the nut h 1s screwed down onto the hub git may be adjusted relative to said washer m, so as to leave as much or aslittle play between the shoulder a on said nut and said washer as desired.

The screw 7c ma nut h relative to the body 6 oft the latter secured to the plate 0 by the screws 0 or otherwise whereby the parts will be securel'y' retained .in theiiadjusted position.

The washer m is a retaming-washeronly,

be turned u to'lockthe lie knob and and the entire thrust of the crank-arm is received by the nut h, referabl by inter osing between the end 0 the era -arm an the n per end of the chamber in the nut in which t e arm enters a ball the up or end of the armbeing chambers out, as s own, to constitute a seat for saidball axially of the end of the arm; and preferably, also, a hardened bearing-plate is located in then per end of 'said chamber d-out portion of t e nut, the

parts being all so roportioned that'when the nut is screwed I own onto the hub g to a proper bearing on the ball the shoulder a of the nut will occupy a proper relative position to the washer m. If esn'ed, the nut k may ceive the externally-t '(shownin Figs. 5 and 6) be used on thethreaded hub 9, against which the nuth may be screwed to lock the latter.

The screw k does not bear on the plate q and the thrust of the crank-arm against sai plate is taken entirely by the nut. Instead of the ball pthe upper end of the crank-arm might he stepped in the plate q, if desired, or some equiva ent abutment should the plate q be omitted from the construction.

Referringnow to Figs. 3 to 6, inclusive, these show the construction of the center grip in its preferred and modified forms. The ip or handle 1' is preferably made of wood in one piece and sli p'ed on the crank-arm a, before the latter is hent up in the form of a crank the grip being generally provided with a bus 'ngs, which does not extend quite to the ends of the grip. These ends are counterbored and internall screw-threaded to re-' metal ca s 'v, which'serve as ends oft e gri These caps are constructed with a flange ed e w, whereby when they are screwed onto t e ends of the grip the latter will fit tightly in the annular recess between said flange w and the hub t of the end caps, whereby should the rips be split the parts" would still be boun together. Another advantage of this construction is that, if desired, the grips may be-made in two parts and applied to the crank-arm after the latter is bent. This also provides placin a broken grip. The olsters a: are preferably made of some hard metal and are secured to the arm by pins 3 but may be cast thereon, as generally practiced at present, if desired, The particular manner of their application is, however, immaterial, as this feature does not constitute any part of the invention, and any bolster however applied may be used.

The bolsters and caps do not quite come into contact, and a bearin -ring 2, 3, of

means fo1:,re-

steel or some other suitab e metal is cated between the caps and bolsters to reduce the frictional contact between these parts.

' Instead of thering 2 an annular-rib 2' may be substituted therefor, this being formed preferably on the caps rather than the bolstersbutlf the latter are made of relatively hard metal the ribs may be formed on these parts, if desired. From the foregoing it will e observed that one of the distinctive features of the invention resides in the effective and thoroughly. assemblage of parts which provide dust-proof for rotatably securin gS the knob on the end of the crank-arm. pointed out, this construction ,ermits of the ready assembling of the parts or mounting the knob in osition and also'for removing it, while at t a same time providing justment of parts without binding connection it wilhbe observed that the chameaded hubs t of the.

bearings for the thrust from the head or 01 an accurate and close ad- I In this bered nut h subserves the dual function of an adjusting member for the bearing provided between the end of the crank-arm and the knob and also as a retaining device or holder for retaining the parts of the split Washer loosely interlocked with the arm of the brace, so that upon removing the screws 0 and k and unscrewing the chambered nut h a quick and ready separation of the knob and hub member from the crankarm may be effected. Also the construction referred to includes as an element thereof a bearing projection P, which may be in the form of a ball or equivalent projection located at the end of the arm (1. within the chambered nut h, and having a centering-bearing at the head or base of the nut. Furthermore, the screw k, which engages the head or base of the nut h, constitutes a dust-proof closure for the knob,while at the same time iermitting of the convenient oiling of the bearing.

Having thus described my invention, what I claim, and desire to secure by Letters Patent of the United States, is

l. The combination with the arm of a bitbrace or the like, of a hub member fitting the arm and having athreaded end, a knob-bod a chambered nut arranged in the knob-b0 y and ad'ustably engaging the threaded end of the hu member, a split washer received within the nut and held thereby loosely interlocked with the -arm of the brace, and a centerin -bea'ring projection arranged at the end of t e arm in the nut and receiving the base of the nut.

2. The combination with the arm of a bitbrace or the like, of a hub member fitting the arm, aknob-body provided on its outer side with a central hole, a centrally-chambered nut arranged in the knob-body and detachably engaging the hub member, ing a threaded opening in its head or base, a retaining device received within the nut and held thereby loosely interlocked with the arm of the brace; a bearing projection at the end of the arm within the nut, and a screw arranged through the hole in the knob and en aging-the t ea'rled opening in the he d or was of the nut.

3. Thecombination with the crank-arm of a bit-brace or the like, of a rotatable center 'p mounted on the arm comprising a sleeve of suitable material, metal caps =for each end of the sleeve having hubs thereon to screw into the latter, and peripheral'flanges to embrace the ends of the sleeve, bolsters located upon the arm contiguous tosaid caps, and a beari -ring interposed between the caps and the b0 stars,

WILLIAM ALLEN BECK.

Witnesses: L

A. K; MoDoN-Am, H. W. BRIGHAM.

said nut hav- 

